Apparatus and method for decoding a PDSCH using pre-emption
PDSCH resource allocations can be received. Different PDSCH resource allocations of the PDSCH resource allocations can be associated with different spatial filters for a user equipment. A pre-emption indication that indicates pre-empted resources can be received. A determination can be made as to whether the pre-emption indication is applicable to a first or second PDSCH resource allocation, both the first and the second PDSCH resource allocations, or no PDSCH resource allocation. A first PDSCH corresponding to the first PDSCH resource allocation can be decoded based on no transmission being present for a UE in the pre-empted resources in response to determining the pre-emption indication is applicable to the first PDSCH resource allocation. The pre-emption indication can be a first pre-emption indication with a first bit-field size and can be indicated in a DCI containing a second pre-emption indication with a second bit-field size different than the first bit-field size.
1. An apparatus comprising:
a transceiver that
receives at least two physical downlink shared channel resource allocations, where different physical downlink shared channel resource allocations of the at least two physical downlink shared channel resource allocations are associated with different spatial filters for the apparatus, and
receives a pre-emption indication that indicates pre-empted resources; and
a controller coupled to the transceiver, where the controller
determines whether the pre-emption indication is applicable to a first physical downlink shared channel resource allocation, a second physical downlink shared channel resource allocation, both physical downlink shared channel resource allocations, or no physical downlink shared channel resource allocation of the at least two physical downlink shared channel resource allocations, and
decodes a first physical downlink shared channel corresponding to the first physical downlink shared channel resource allocation based on no transmission being present for the apparatus in the pre-empted resources in response to determining the pre-emption indication is applicable to the first physical downlink shared channel resource allocation,
wherein the pre-emption indication is a first pre-emption indication with a first bit-field size, and
wherein the first pre-emption indication is indicated in a downlink control information containing a second pre-emption indication with a second bit-field size different than the first bit-field size.
2. The apparatus according to claim 1 , wherein the first physical downlink shared channel resource allocation allocates same resources as the second physical downlink shared channel resource allocation.
3. The apparatus according to claim 1 , wherein the first physical downlink shared channel comprises at least two spatial layers and the pre-emption indication applicable to the first physical downlink shared channel resource allocation indicates no transmission is present for the apparatus in resources indicated for a proper subset of the at least two spatial layers.
4. The apparatus according to claim 1 , wherein the controller determines whether the pre-emption indication is applicable based on a field in the pre-emption indication.
5. The apparatus according to claim 4 , wherein the field contains at least one selected from a transmission configuration information-state and a synchronization signal block index.
6. The apparatus according to claim 4 , wherein the controller determines whether the pre-emption indication is applicable to the first physical downlink shared channel resource allocation based on the field in the pre-emption indication.
7. The apparatus according to claim 1 , wherein the controller determines whether the pre-emption indication is applicable based on the search space the pre-emption indication is received.
8. The apparatus according to claim 1 , wherein the controller determines whether the pre-emption indication is applicable based on a radio network temporary identifier associated with the pre-emption indication.
9. The apparatus according to claim 1 , wherein the controller decodes a second physical downlink shared channel corresponding to the second physical downlink shared channel resource allocation based on the pre-emption indication not being applicable to the second physical downlink shared channel.
10. The apparatus according to claim 1 , wherein different physical downlink shared channel resource allocations are associated with different spatial filters for the apparatus based on the first physical downlink shared channel and the second physical downlink shared channel being quasi co-located with different reference signals.
11. The apparatus according to claim 1 , wherein the at least two physical downlink shared channel resource allocations are received in at least one downlink control information.
12. The apparatus according to claim 1 , wherein the controller determines the pre-emption indication is applicable to the first physical downlink shared channel resource allocation.
13. The apparatus according to claim 1 ,
wherein the apparatus is configured with a first pre-emption configuration and a second pre-emption configuration,
wherein the controller
monitors pre-emption indications associated with a first spatial filter of the different spatial filters according to the first pre-emption configuration; and
monitors pre-emption indications associated with a second spatial filter of the different spatial filters according to the second pre-emption configuration, and
wherein at least one of the first pre-emption configuration and the second pre-emption configuration includes at least one selected from a pre-emption position index in the downlink control information, a monitoring periodicity of a pre-emption indication, a radio network temporary identifier value corresponding to the downlink control information, and a downlink control information payload size.
14. The apparatus according to claim 1 , wherein pre-empted resources comprise at least one selected from resources to be punctured and resources to be rate matched around.
15. The apparatus according to claim 1 ,
wherein the transceiver receives the pre-emption indication comprising a first number of bits in a downlink control information payload,
wherein the transceiver receives a higher layer parameter indicating a starting position of the pre-emption indication, where a higher layer is higher than a physical layer, and
wherein the indicated starting position of the pre-emption indication in the downlink control information payload is in multiples of a second number, where the second number is less than the first number, and where the second number is a second largest divisor of the first number or the second number is a greatest common divisor of 14 and the first number.
16. The apparatus according to claim 1 ,
wherein the apparatus is configured with first pre-emption configuration parameters, and
wherein the controller determines second pre-emption configuration parameters based on the first pre-emption configuration parameters.
17. The apparatus according to claim 1 , wherein the pre-emption indication comprises a rate-matching indication.
18. A method at the user equipment, the method comprising:
receiving at least two physical downlink shared channel resource allocations, where different physical downlink shared channel resource allocations of the at least two physical downlink shared channel resource allocations are associated with different spatial filters for the user equipment;
receiving a pre-emption indication that indicates pre-empted resources;
determining whether the pre-emption indication is applicable to a first physical downlink shared channel resource allocation, a second physical downlink shared channel resource allocation, both the first and the second physical downlink shared channel resource allocations, or no physical downlink shared channel resource allocation of the at least two physical downlink shared channel resource allocations; and
decoding a first physical downlink shared channel corresponding to the first physical downlink shared channel resource allocation based on no transmission being present for the user equipment in the pre-empted resources in response to determining the pre-emption indication is applicable to the first physical downlink shared channel resource allocation,
wherein the pre-emption indication is a first pre-emption indication with a first bit-field size, and
wherein the first pre-emption indication is indicated in a downlink control information containing a second pre-emption indication with a second bit-field size different than the first bit-field size.
19. The method according to claim 18 , wherein the pre-emption indication comprises a rate-matching indication.
20. An apparatus comprising:
a controller that controls operations of the apparatus; and
a transceiver coupled to the controller, where the transceiver
transmits at least two physical downlink shared channel resource allocations, where different physical downlink shared channel resource allocations of the at least two physical downlink shared channel resource allocations are associated with different spatial filters for a user equipment,
transmits a first pre-emption indication that indicates pre-empted resources,
where the first pre-emption indication has a first bit-field size,
where the first pre-emption indication is indicated in a downlink control information containing a second pre-emption indication with a second bit-field size different than the first bit-field size, and
where the first pre-emption indication is transmitted to indicate whether the pre-emption indication is applicable to a first physical downlink shared channel resource allocation, a second physical downlink shared channel resource allocation, both physical downlink shared channel resource allocations, or no physical downlink shared channel resource allocation of the at least two physical downlink shared channel resource allocations, and
transmits a first physical downlink shared channel corresponding to the first physical downlink shared channel resource allocation based on no transmission being present for the user equipment in the pre-empted resources based on the pre-emption indication being applicable to the first physical downlink shared channel resource allocation.